کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1386930 | 982540 | 2011 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microwave assisted synthesis of pH-responsive swellable adducts of chitosan-polyuronic acids
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
A facile method for synthesizing super-swellable, pH-responsive and insoluble adducts (e.g. CH-PMA and CH-PGA) of acid-soluble chitosan (CH) with alkali-soluble poly-mannuronic (PMA) and poly-guluronic (PGA) acids using microwave (MW) heating is described. The reactions were also carried out using conventional oil bath heating method. Microwave heating to 100 °C for 5 min produced greatest yields (95-97%) and swelling ratios (2700-3000%) with these two acids. The conventional heating method, however, required 60 min to produce greatest yields (74-80%) and swelling ratios (1450-1900%), which plateaued even on heating up to 120 min. Adducts were characterized by FT-IR and CP-MAS 13C NMR techniques.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 83, Issue 3, 30 January 2011, Pages 1402-1407
Journal: Carbohydrate Polymers - Volume 83, Issue 3, 30 January 2011, Pages 1402-1407
نویسندگان
Ramavatar Meena, Mahesh U. Chhatbar, Kamalesh Prasad, A.K. Siddhanta,